Integrated Moisture Sensor Monitoring for Dew and Frost Prediction
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Solution Overview
Problem
Current dew and frost observation systems using capacitive moisture condition sensors only detect the presence or absence of dew and frost without observing surface temperature or dew point, limiting accurate prediction and preparation for these environmental factors in crop production.
Innovation Solution
A crop condition monitoring system utilizing a first capacitive moisture condition sensor, a non-contact surface temperature sensor, a contact surface temperature sensor, a temperature and humidity sensor, and a crop condition monitoring server to accurately measure and predict dew and frost by combining voltage changes, surface temperatures, and dew points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a capacitive moisture condition sensor is used to detect dew and frost, then the presence or absence of dew and frost can be observed, but the surface temperature and dew point cannot be measured
Solution Approach 1:
The patent combines a capacitive moisture condition sensor with a surface temperature sensor into an integrated observation device. The capacitive sensor detects water condensation (dew/frost) while the temperature sensor measures surface temperature simultaneously, resolving the contradiction by merging two previously separate measurement functions into one unified system.
Solution Approach 2:
The integrated sensor device performs multiple functions: it detects both the presence of dew/frost (via capacitive measurement) and surface temperature (via temperature sensing). This multi-functional approach eliminates the need for separate devices and ensures all necessary parameters for accurate dew and frost observation are captured simultaneously.
2Device complexity
If only a capacitive moisture condition sensor is used, then the device structure remains simple, but accurate prediction of dew and frost cannot be made without surface temperature and dew point
Solution Approach 1:
The patent merges the capacitive moisture condition sensor and surface temperature sensor into a single integrated device, maintaining relative structural simplicity while enabling accurate dew and frost prediction through combined measurements of both moisture presence and surface temperature.
Solution Approach 2:
The integrated sensor device automatically performs both capacitive measurement and temperature sensing, and the system uses these measurements to calculate dew point and predict dew/frost occurrence without requiring additional separate measurement systems, thereby maintaining simplicity while improving reliability.
3Measurement precision
If a contact surface temperature sensor is attached to the capacitive moisture condition sensor, then surface temperature can be measured, but interference may occur in the measurements
Solution Approach 1:
The patent extracts the temperature sensing function from a separate contact sensor and integrates it into the capacitive sensor structure itself, or positions it to measure the capacitive sensor's surface temperature directly. This eliminates interference by ensuring the temperature measurement is taken at the exact location where dew/frost condensation occurs, without the temperature sensor affecting the capacitive measurement.
Solution Approach 2:
The patent uses the capacitive sensor's own surface as an intermediary - the temperature sensor measures the temperature of the capacitive sensor surface itself, which is the same surface where dew/frost condensation occurs. This intermediary approach ensures both measurements refer to the same physical location without mutual interference.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables high-accuracy prediction of dew and frost occurrences by correcting surface temperature measurements and analyzing voltage changes, improving the accuracy of frost and dew detection in agricultural environments.
Implementation Method 1
a capacitive moisture condition sensor detects a voltage according to a water condition
Implementation Method 2
a non-contact surface temperature sensor configured to detect a surface temperature of the first capacitive moisture condition sensor
Implementation Method 3
a temperature and humidity sensor configured to detect a dew point
Implementation Method 4
when the air temperature reaches the dew point, water vapor in the air condenses
Data Source
AI summary
A crop condition monitoring system includes a first capacitive moisture condition sensor detects a first voltage according to a water condition, a second capacitive moisture condition sensor detects a second voltage according to a water condition, a non-contact surface temperature sensor configured to detect a surface temperature of the first capacitive moisture condition sensor and generate a first surface temperature, a contact surface temperature sensor configured to detect a surface temperature of the second capacitive moisture condition sensor and generate a second surface temperature, the contact surface temperature sensor formed on the second capacitive moisture condition sensor, a temperature and humidity sensor configured to detect a dew point, and a crop condition monitoring server configured to predict the occurrence of dew and frost using the first voltage, the second voltage, the first surface temperature, the second surface temperature, and the dew point received from the temperature and humidity sensor.